125 



29. THARSALEA Scudder. 



Type : Polyommatus Arota Boisd. 



This group my be readily distinguished from all other genera of American 

 Villicantes by the pointed tail of the lower median nervule of the hind wings ; 

 the Thecloid markings of the under surface of the same wings also give it a 

 peculiar aspect. The middle of the hind border of the hind wings, instead of 

 being full and rounded in the female, as it is in every other North American 

 genus, is rather excised ; the cell of the fore wing is more than half as long as 

 the wing. The fore tibiae of the male are seven-eighths, and those of the 

 female more than three-quarters as long as the hind tibiae ; the basal joint of 

 middle and hind tarsi is not at all swollen. 



284. Tirg-iniensis Edic, Trans. Am. Ent. Soc, 3, 21-2 {Chrysoplianus) ; Kirb. 



Syn. Cat. Lep., 3io (Lycaena) ; Streck., Lep. Rhop.-Het., 91, pi. 10, 

 figs. 21, 21, 22 {Lycaena). 

 Nevada, Colorado. 



285. Arota Boisd., Ann. Soc. Ent. Fr. [2], 10, 293-4 (Polyommatus); Kirb., 



Syn. Cat. Lep., 343 {Lycaena) ; Streck., Lep. Rhop.-Het., 91, pi. 10, figs. 

 27, 27, 28 {Lycaena). 

 California. 



286. *Herme3 Edw.. Trans. Am. Ent. Soc, 3, 21 .(C7rrysop7iani/s) ; Kirb., Syn. 



Cat. Lep., 345 {Lycaena) ; Streck., Lep. Rhop.-Het., 91-2 (Lycaena). 

 California, Nevada. 



30. CHALCEPtIA Scudder. 



Type : Chrysoplianus rubidus Behr. 



The males of the known species of this genus are remarkable for the warmth 

 of the brazen tint borne by the upper surface of the wings, which are other- 

 wise marked with a narrow dark edging. Most of them also have very light, 

 and all of them roundish ocellate markings on the under surface of the hind 

 wings, recalling the genera Cupido and Nomiades among the Blues. The club 

 of the antennae is rather shorter than in the other genera. The fore tibiae of 

 both sexes are about five-sixths the length of the hind tibiae ; the basal tarsal 

 joint of middle and hind legs is not at all swollen. The hind wings are rounded 

 and are nearly alike in the two sexes, recalling, in this respect, the genus 

 Chrysophanus, but the fore wings are rather more pointed than there, and 

 rather approach Gaeides, from which this group difiers in the rounded hind 

 wings of the male ; the cell is slightly more than half the length of the wing. 



287. cuprea Edw., Trans. Am. Ent, Soc, 3,20-1 (Chrysoplianus); lb., Butt. 



N. Am., 2, pi. Chrys. l.figs. 4-7 (Chrysophanus); Kirb., Syn. Cat. Lep., 

 345 (Lycaena); Streck., Lep. Rhop. Het., 92 (Lycaena). 

 Oregon, Sierra Nevada of California. 



